Piston-ring.



J. STODDARD.

PISTON RING.

nzuonml FILED In. 13, mo.V

Patented June 28,1910. v

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JUSTIQ" STODDARD. OE' STILLWATER,

MINE-I'ESQTA.

Specfcatinn of Letters Patent.

Patented June 2S, 1910.

Application filed January 13. 1910. Serial No. 537,824.

fo alii winni i! moi/ Concern.'

lle it linfa-vii that l, lis'iEN Si'onmiin, a. citizen of the liiiierl States, residing at Stillwater. in the county of l'i'ashington and Stare oit siiimcsntin have invented a new anni useful, Piston-lling, of which the following its a speciti' ^arioii.`

My ini'eiition relates` to piston rings for reciprocating pistons of aeani engin and the olijeet to nrmiile ifi-piston riin,r that will automatically expand against the sides of the steam cylinder in an e'iieient manner and stil! only iviili the necessary friction;

:intl a portion of a piston rofl Secured tlierei in. Fig. it an edge view of the complete piston anil ring mi together and a portion of n piston rial iii it.

Referring to the ilrawiiig by reference;

numerals, l i'lesigiiatcs a piston ioil on which secareil liy :i lie); 'i the piston lieail 3j 'l'lie latter i formell `with the iisiial lioilv tlarwe i Tl anti ventral linli lia\iii,i f a recess l, iii hielt is srriiri-l l-.\ cap screws or holt.` the follow-plate of the pieton. llt-tween the plate (3 and the inner frire of the piston heail is siiiifgly yet inovalgily titteii the packingl ring, which is ronipiweil of thi-pp gpgand threaded eni 22 hold the segmental lapplates Q0 in the recesses 1S.

In the use of the piston with this improved ring' in it, when the piston. is in a esi'liiiilei', the lapplates 20 prevent escape. of steam from one side of thc piston to the other between the alnittin;r ends of the rinr section, and the springs 13 expand the ring sci-rions an'l .by tollem the lap-plates against the sides of the cylinder. The exact tension (lesii'erl or needed is regulated by ailjiistn'ieiit of the collars l-l to and fiom the spring i3.

What I claim is:

l. In combination with a two-part piston for reciiirijieating engines, n, pac-hing ring fitting between the two members of the piston aia-l comi;- soil of a series 0f segmental t ring sections lint` ing against each other with their eiiils= saiil eiiils having each an inwardly ilirccteil arm. a rod secured in one of said arms and slitling with its other end in the adjacent arm of the next ring section, a compri steil coii spring encircling the rod7 and means on the rod for compressing the spring more or less against the iii-iii iii which the roil sliiles, saii'l sections having their ends recesactl iipoii the siiles facing the inemliers of the piston` anil slots through the portion reilineil in thickness by the recesses,

Isegnieiital lap-plates in tlic recesses am means securing the lapplates together, said mental .sections 'i'. the enils of which come 1 piston :intl coiniiosetl of aserics of segmental iioriiiall)y almost together :intl are each proviileilA ith an iniraril-iliricteil :irai 8 hav@ one mid liriiily helil in one ot' the 'frias hi.

iii Y :i holi` through it for a liolt- 5l, which has means passing through Said slots.

f2. In combination with a two-part piston for reciin'oiraiinif engines, a packing ring fitting oetween the two members of the ring'r sections batting against eachother with their ends. `sanl ends havingr each an 1nwariltv directed arm, a roil secured in one iam mits lll, the other cnil of thi; holt sliilcrx in the hole ot' the arni S of the next ring section iii which it is i'etaiiioil liti' a i'ollai' ll seriii'iil liy a set screw l. is pluvial :i :foil spring lll. which partly Upon saiil liar of said arms and sliding with its other end in the adjacent arm of the next ring section, a ifoiiiprvsseil coil spring encircling thelrod, aial means on the rod for compressing thesiiriii; more or less` against the arm in which eosiiineswil laiaveiitlir aiiii in wliii'ili IlaA laili or rial .sliilex :mil :i collar llziily-tstalily i hers et' the piston; lap-plates in said relielil hy :i set will lf on the. i'oil.

'l`lic :nl lzii'i-nt ciiilr' of liiring sections' are sonic li-aanwas' lroiii lla-ii' inni-r =.'ni.c to their ontw iwiiiiliiiy lorisnal with weinental i'i-i'iN-os ll', which iialiii'i the cnil to :i wei; ll' tretto ilalift iii Vig. :2); iavli uli is pi'oviiliil 'with :i lot i\. tliioiigli whirl. is limsi-ly passai-l n .www lil, wlimilieail 2l ila-y roti sliilea, saiil sections, haring their enils rela-eil upon the siiles facing the meinccsses :intl means for holding the plates in the recesses, the eiiils ot' the ring sections havingr longitudinal play between the lapplates.

3. la cmiilnnation with a two-part Jpiston im" i'eviiiroeaiiiig engines7 a pacliiiigriiig iittiiig between the two members ot the piston and composei4 a series uf segmental ling sections hurting against each oiliei willi their ends, sui-l ends having each :m n- Warflly directed armj .1 rod secured lin one of said arms and vling with its other end in the adjacentarm of lxe next ring section. a Compressed cnil and means on the.

rofl for compressing the spring more or less aguixxst. the :i1-m in which the rod slides, sind sentieri; having t-licn'i ends recessed upon the sides facing the members of the piston; lap-plates in said 5 spring encircling the rod, i

recesses and means for holdinr the plaies in the recesses, the ends of the ring sections having longitudinal play plates; and means on the sliding @nel of the rod tu prevent it: accidental separation from ille arm it slides in. In testimony whereof I allix my signzum'cs 1n presence of two Witnesses.

-J USTEN S'I.`ODI`L\RD. -ftnessesz L. lV. BURG-IARD, CARL MUNSON.

between. ille lup- 1 

